<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list clearfix">
                    <div class="button-wrapper">
                        <div class="button">{{city}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list clearfix">
                    <div class="button-wrapper" v-for="item in hot" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                    
                </div>
            </div>
            <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="innerItem in item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
                   
                </div>
            </div>
           
        </div>
    </div>
</template>
<script>
import BScroll from 'better-scroll'

import {mapGetters,mapMutations,mapActions} from 'vuex'
export default {
    name:'CityList',
    computed:{
        ...mapGetters([
            'city'
        ])
    },
    props:{
        cities:{
            type:Object,
            default(){
                return {}
            }
        },
        hot:{
            type:Array,
            default(){
                return []
            }
        },
        letter:{
            type:String,
            default:''
        }
    },
    watch:{
        letter(newVal){
            const element = this.$refs[this.letter][0]
            if(this.letter){
                this.scroll.scrollToElement(element)
            }
        }
    },
    mounted(){
        this.scroll = new BScroll(this.$refs.wrapper)
    },
    methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.back()
        },
        ...mapMutations({
            setCity:'SET_CITY'
            
        }),
        ...mapActions(['changeCity'])
    }
}
</script>
<style lang="stylus" scoped>
@import '../assets/styles/varibles.styl'
  
  .list 
    overflow hidden
    position absolute
    top 1.58rem 
    left 0
    right 0
    bottom 0   
    .border-topbottom
      &:before
        border-color #ccc 
      &:after 
        border-color #ccc    
    .border-bottom  
      &:before
        border-color #ccc 
      &:after 
        border-color #ccc           
    .title 
      line-height .44rem 
      background #eee
      padding-left .2rem
      color #666
      font-size .26rem
    .button-list 
      padding .1rem
      .button-wrapper 
        width 33.33%  
        float left 
        .button 
          margin .1rem  
          padding .1rem  .6rem .1rem .1rem

          text-align center    
          border .02rem solid #ccc
    .item-list 
      .item 
        line-height .54rem
        color #666   
        padding-left .2rem    
</style>